Error running backtest

[packcrypto]

could someone advice on combatting this error?

  <-- POST /api/backtest
  xxx POST /api/backtest 500 237ms -

  Error: non-error thrown: 
  This Gekko instance encountered an error and can't continue
      at Object.onerror (/Users/ikeshpack/gekko/node_modules/koa/lib/context.js:105:40)
      at process._tickCallback (internal/process/next_tick.js:68:7)